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    <div class="example" id="http-clients">
      <h2><a href="./">Go by Example 中文版</a>: HTTP 客户端</h2>
      
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            <p>Go 标准库的 <code>net/http</code> 包为 HTTP 客户端和服务端提供了出色的支持。
在这个例子中，我们将使用它发送简单的 HTTP 请求。</p>

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            <a href="http://play.golang.org/p/9RZNxLcPBcK"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
          <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
</pre></div>

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          <div class="highlight"><pre><span class="kn">import</span> <span class="p">(</span>
    <span class="s">&quot;bufio&quot;</span>
    <span class="s">&quot;fmt&quot;</span>
    <span class="s">&quot;net/http&quot;</span>
<span class="p">)</span>
</pre></div>

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          <div class="highlight"><pre><span class="kd">func</span> <span class="nx">main</span><span class="p">()</span> <span class="p">{</span>
</pre></div>

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            <p>向服务端发送一个 HTTP GET 请求。
<code>http.Get</code> 是创建 <code>http.Client</code> 对象并调用其 <code>Get</code> 方法的快捷方式。
它使用了 <code>http.DefaultClient</code> 对象及其默认设置。</p>

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          <div class="highlight"><pre>    <span class="nx">resp</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">http</span><span class="p">.</span><span class="nx">Get</span><span class="p">(</span><span class="s">&quot;http://gobyexample.com&quot;</span><span class="p">)</span>
    <span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
        <span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
    <span class="p">}</span>
    <span class="k">defer</span> <span class="nx">resp</span><span class="p">.</span><span class="nx">Body</span><span class="p">.</span><span class="nx">Close</span><span class="p">()</span>
</pre></div>

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            <p>打印 HTTP response 状态.</p>

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          <div class="highlight"><pre>    <span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="s">&quot;Response status:&quot;</span><span class="p">,</span> <span class="nx">resp</span><span class="p">.</span><span class="nx">Status</span><span class="p">)</span>
</pre></div>

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            <p>打印 response body 前面 5 行的内容。</p>

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          <div class="highlight"><pre>    <span class="nx">scanner</span> <span class="o">:=</span> <span class="nx">bufio</span><span class="p">.</span><span class="nx">NewScanner</span><span class="p">(</span><span class="nx">resp</span><span class="p">.</span><span class="nx">Body</span><span class="p">)</span>
    <span class="k">for</span> <span class="nx">i</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">scanner</span><span class="p">.</span><span class="nx">Scan</span><span class="p">()</span> <span class="o">&amp;&amp;</span> <span class="nx">i</span> <span class="p">&lt;</span> <span class="mi">5</span><span class="p">;</span> <span class="nx">i</span><span class="o">++</span> <span class="p">{</span>
        <span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="nx">scanner</span><span class="p">.</span><span class="nx">Text</span><span class="p">())</span>
    <span class="p">}</span>
</pre></div>

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          <div class="highlight"><pre>    <span class="k">if</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">scanner</span><span class="p">.</span><span class="nx">Err</span><span class="p">();</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
        <span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
    <span class="p">}</span>
<span class="p">}</span>
</pre></div>

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          <div class="highlight"><pre><span class="gp">$</span> go run http-clients.go
<span class="go">Response status: 200 OK</span>
<span class="go">&lt;!DOCTYPE html&gt;</span>
<span class="go">&lt;html&gt;</span>
<span class="go">  &lt;head&gt;</span>
<span class="go">    &lt;meta charset=&quot;utf-8&quot;&gt;</span>
<span class="go">    &lt;title&gt;Go by Example&lt;/title&gt;</span>
</pre></div>

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      <p class="next">
        下一个例子: <a href="http-servers">HTTP 服务端</a>
      </p>
      
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